My '66 has the small back window. And like 4-5-6 said, you have to lean way over the seat or out the window when backing up or changing lanes. My grandpaw's '71 had the big back window (standard starting that year) and I loved that window, especially when we were getting a trailer backed down into the woods or the barn. I'm planning on converting mine into the big back window when the time gets here.
